A giant-magnetoresistance sensor for magnetic-flux-leakage nondestructive testing of a pipeline

作者：Chen, L^*; Que, PW; Jin, T

来源：Russian Journal of Nondestructive Testing, 2005, 41(7): 462-465.

DOI：10.1007/s11181-005-0193-7

• Magnetic-flux-leakage
• Oil pipelines
• Permanent-magnet assembly

This paper presents the method of magnetic-flux-leakage (MFL) detection and the characteristics of a giant-magnetoresistance (GMR) sensor. An experimental apparatus that uses a GMR sensor for oil-pipeline inspection is described. A permanent-magnet assembly was used to excite MFL signals. The signal from the GMR sensor is preamplified with an appropriate gain. The result shows the magnetic-flux-leakage method based on a GMR sensor can detect small defects in an oil pipeline.

• 出版日期2005-7
• 单位上海交通大学